Light-Matter Interactions Unit (Síle Nic Chormaic)
Professor Síle Nic Chormaic FInstP
sile.nicchormaic at oist.jp
Welcome to the website of the Light-Matter Interactions Unit here at OIST, led by Prof. Síle Nic Chormaic. We work in atomic and optical physics and consist of three sub-groups: Neutral Atoms for Quantum Technologies, NanoBioOptics and Optical Cavities & Sensing. For more information about our research topics please look at our research page or our publications page. If you are fascinated by the beauty of light and the enormous role it plays in the world around us then this is the place for you!
We explore light as a tool in classical physics, such as when it can be used to push or pull individual particles (think of where a comet's tail comes from!), or for exploring the dynamics of colloidal particles (such as cells, bacteria, or test spheres), or even light's ability to be used in sensing of very small numbers of particles.
Of course, there's a world beyond the classical and we also consider light's role in quantum physics, where photons can be used to slow down neutral atoms, in a process known as laser-cooling, or combined with magnetic fields to spatially trap and cool atoms in a magneto-optical trap, where temperatures of about 100 microKelvin are routinely obtained in the lab. All of these techniques are crucial in the development of future quantum-based technologies relying on neutral ground state or Rydberg atoms.
In general, we study the interaction between light and matter in a number of regimes, including cold atomic systems, whispering gallery mode microresonators and biologically-relevant samples, to gain a better understanding of the processes involved and to manipulate or trap micron and nanoscaled particles using light fields. A common technique across our work is the use of optical nanofibres as the interface tool between the light source and the sample under investigation. Researchers in our unit need/acquire a huge range of skills from optics, atomic physics, simulations, photonics, electronics, vacuum, cryogenics, nanotechnology, interfacing, programming, and so on, and there are some opportunities to gain skills in biophysics and other interdisciplinary topics such as sensing and imaging. While much of our research focus is fundamental in nature, we use skills that are highly relevant to industry with a focus on nanofabrication, optics, automation, system modelling and control.
Some of the facilities we have include 2 magneto-optical traps for Rb (one for Rydberg atom generation), 3 optical nanofibre pulling rigs, several microscopes, numerous tunable lasers from visible to near IR, optical spectrum analysers, vector network analyser, high speed oscilloscopes, wavemeters, optical tweezers, Ti:Saph laser, fs laser, cryostat, clean room with open access, SEM, FIB (dual beam), spatial light modulators, single photon detectors, etc.
Students interested in studying for a PhD with us should apply through the OIST Graduate University PhD Programme at https://groups.oist.jp/grad or contact us for informal discussions about the entry requirements. We are seeking students with a strong combination of experimental and analytical skills, with emphasis in classical and quantum optics. We can only accept students who officially apply through the Graduate School programme, which provides a full scholarship for 5 years and conference travel costs. Previous students are employed in large-scale research facilities, optics-related industries, at universities, in airlines, or are involved in scientific publishing.
If you are a student elsewhere and wish to spend a research period of up to 6 months with our group, we'd be happy to consider your application. OIST also offers a dedicated research intern programme for BSc or MSc students from Japan or Overseas - details are available at https://groups.oist.jp/grad/research-interns. Please email Prof. Nic Chormaic to discuss opportunities.
Details of our earlier work can be found at here.
The LMI Unit acknowledges funding from OIST, JSPS and JASSO.
A simple, narrow, and robust atomic frequency reference at 993 nm exploiting the rubidium (Rb) 5S1/2 to 6S1/2 transition using one-color two-photon excitation. T Nieddu, T Ray, KS Rajasree, R Roy and S Nic Chormaic, Opt. Express 27, 6528 (2019)
Nanopositioner and method of making. RMJ Murphy, F Lei, J Ward, S Nic Chormaic and Y Yang. US 2019/0033527 A1.
Welcome to two new unit members. Vandna Gokroo rejoins the unit as a staff scientist from Washington State University (USA), while Jean-Baptiste Ceppe joins as a postdoc having completed his PhD at the University of Rennes (France).